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Acirsa epsilon
Taxonomy
Acirsa epsilon was named by Squires and Saul (2003). Its type specimen is LACMIP 13008 and is a 3D body fossil. Its type locality is LACMIP loc. 23639, Chico Creek, which is in a Campanian coastal sandstone in the Chico Formation of California.
Sister species lacking formal opinion data
A. cerithiformis, A. corrugata, A. elatior, A. heyseana, A. kelseyi, A. lanceolata, A. meeki, A. ochotensis, A. solumcostata, A. subplicata, A. erasa, A. pervaricosa, A. striatula, A. corrugata, A. duvergieri, A. lanceolata, A. ofunatoensis, A. oscari, A. parvicostata, A. texana, A. leunisii, A. mioplicatula
Synonymy list
| Year | Name and author |
|---|---|
| 2003 | Acirsa epsilon Squires and Saul pp. 37 - 38 figs. Figures 52-54 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Acirsa epsilon Squires and Saul 2003
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. L. Squires and L. R. Saul 2003 | A small Acirsa with cancellate sculpture. Axial ribs slightly stronger than spiral ribs. Axial ribs narrow and closely spaced, approximately 27 on penultimate whorl. Sunken rectangular interspaces between intersections of axial and spiral ribs. Basal part of last whorl with very fine and minutely beaded cancellate sculpture. |